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Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Overcast
74°F
23°C
| Humidity | 82% |
| Wind Speed | NW 3 mph |
| Barometer | 30.04 in (1016.6 mb) |
| Dewpoint | 68°F (20°C) |
| Visibility | 10.00 mi |
| Last update | 14 Oct 12:54 pm CDT |
Extended Forecast for
Chestnut IL
This Afternoon

High: 76 °F
Mostly Cloudy
Tonight
Low: 61 °F
Cloudy then
Slight Chance
ShowersThursday

High: 75 °F
Showers
Thursday Night

Low: 47 °F
Showers
Likely and
BreezyFriday
High: 57 °F
Breezy.
Partly Sunny
then Chance
ShowersFriday Night

Low: 37 °F
Decreasing
CloudsSaturday

High: 60 °F
Areas Frost
then SunnySaturday Night

Low: 36 °F
Clear
Sunday

High: 66 °F
Areas Frost
then Sunny
Detailed Forecast
This Afternoon
Mostly cloudy, with a high near 76. North wind around 8 mph.
Tonight
A slight chance of showers before 3am, then a slight chance of showers after 4am. Cloudy, with a low around 61. East northeast wind 8 to 11 mph, with gusts as high as 17 mph. Chance of precipitation is 20%.
Thursday
Showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. High near 75. East wind around 9 mph becoming south in the afternoon. Winds could gust as high as 17 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
Showers and thunderstorms likely before midnight, then a chance of showers between midnight and 1am. Mostly cloudy, with a low around 47. Breezy, with a west northwest wind 10 to 15 mph increasing to 16 to 21 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A 30 percent chance of showers after 1pm. Partly sunny, with a high near 57. Breezy, with a northwest wind 21 to 24 mph, with gusts as high as 36 mph.
Friday Night
Mostly cloudy, then gradually becoming clear, with a low around 37. North wind 10 to 17 mph, with gusts as high as 23 mph.
Saturday
Areas of frost before 8am. Otherwise, sunny, with a high near 60. North wind around 6 mph becoming calm in the morning.
Saturday Night
Clear, with a low around 36.
Sunday
Areas of frost before 7am. Otherwise, sunny, with a high near 66.
Sunday Night
Mostly clear, with a low around 40.
Monday
Mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 74.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Chestnut IL
40.07°N 89.19°W (Elev. 600 ft)
40.07°N 89.19°W (Elev. 600 ft)
1:26 pm CDT Oct 14, 2026
1pm CDT Oct 14, 2026-6pm CDT Oct 20, 2026



